<span>1.The Chinese did not have any more uses for a navy.
2.The voyages were becoming to expensive.
3.They wanted to divert their attention to stopping the Mongolians.
4.The Chinese began to adopt a policy of isolationism and did not want to interact with anyone.</span>https://answers.yahoo.com/question/index?qid=20130423165801AABEmGv
The Chinese Exclusion Act was an immigration law passed in 1882 that prevented Chinese laborers from immigrating to the United States. The Chinese Exclusion Act was the first immigration law that excluded an entire ethnic group. It also excluded Chinese nationals from eligibility for United States citizenship.
